/Engine/Plugins/Enterprise/DatasmithImporter/Source/DatasmithImporter/Public/ObjectElements/DatasmithUSceneElement.h
Create an array with all the level variants sets from the Datasmith scene Use CreateLevelVariantSets -or- RemoveLevelVariantSets to modify the Datasmith scene.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Datasmith | Scene") [TArray](API\Runtime\Core\Containers\TArray)< [UDatasmithLevelVariantSetsElement](API\Plugins\DatasmithImporter\ObjectElements\UDatasmithLevelVariantSetsElemen-) * > GetAllLevelVariantSets()